21111222022000 has 320 divisors, whose sum is σ = 58342033870848. Its totient is φ = 7318270080000.

The previous prime is 21111222021973. The next prime is 21111222022001. The reversal of 21111222022000 is 22022211112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111222022001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 45462994 + ... + 45925006.

Almost surely, 2^{21111222022000} is an apocalyptic number.

21111222022000 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 21111222022000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29171016935424).

21111222022000 is an abundant number, since it is smaller than the sum of its proper divisors (37230811848848).

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

21111222022000 is a wasteful number, since it uses less digits than its factorization.

21111222022000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462145 (or 462129 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21111222022000 its reverse (22022211112), we get a palindrome (21133244233112).

It can be divided in two parts, 211 and 11222022000, that added together give a palindrome (11222022211).

The spelling of 21111222022000 in words is "twenty-one trillion, one hundred eleven billion, two hundred twenty-two million, twenty-two thousand".