211211110012020 has 24 divisors (see below), whose sum is σ = 591391108033824. Its totient is φ = 56322962669856.

The previous prime is 211211110011989. The next prime is 211211110012051. The reversal of 211211110012020 is 20210011112112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (211211110011989) and next prime (211211110012051).

It is a super-2 number, since 2×211211110012020² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1760092583374 + ... + 1760092583493.

It is an arithmetic number, because the mean of its divisors is an integer number (24641296168076).

Almost surely, 2^{211211110012020} is an apocalyptic number.

211211110012020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211211110012020 is an abundant number, since it is smaller than the sum of its proper divisors (380179998021804).

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

211211110012020 is a wasteful number, since it uses less digits than its factorization.

211211110012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3520185166879 (or 3520185166877 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 211211110012020 its reverse (20210011112112), we get a palindrome (231421121124132).

The spelling of 211211110012020 in words is "two hundred eleven trillion, two hundred eleven billion, one hundred ten million, twelve thousand, twenty".