211122021000000 has 784 divisors, whose sum is σ = 768840538715136. Its totient is φ = 50701920000000.

The previous prime is 211122020999887. The next prime is 211122021000013. The reversal of 211122021000000 is 120221112.

It is a super-2 number, since 2×211122021000000² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 211122021000000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 3530970105 + ... + 3531029895.

Almost surely, 2^{211122021000000} is an apocalyptic number.

211122021000000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211122021000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (384420269357568).

211122021000000 is an abundant number, since it is smaller than the sum of its proper divisors (557718517715136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211122021000000 is an equidigital number, since it uses as much as digits as its factorization.

211122021000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59954 (or 59919 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 211122021000000 its reverse (120221112), we get a palindrome (211122141221112).

The spelling of 211122021000000 in words is "two hundred eleven trillion, one hundred twenty-two billion, twenty-one million", and thus it is an aban number.