210111022221012 has 72 divisors (see below), whose sum is σ = 579399081206400. Its totient is φ = 63669784763520.

The previous prime is 210111022220993. The next prime is 210111022221049. The reversal of 210111022221012 is 210122220111012.

210111022221012 is a `hidden beast` number, since 210 + 1 + 1 + 10 + 222 + 210 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 139813989 + ... + 141308787.

It is an arithmetic number, because the mean of its divisors is an integer number (8047209461200).

Almost surely, 2^{210111022221012} is an apocalyptic number.

210111022221012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

210111022221012 is an abundant number, since it is smaller than the sum of its proper divisors (369288058985388).

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

210111022221012 is a wasteful number, since it uses less digits than its factorization.

210111022221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1849773 (or 1849768 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 210111022221012 its reverse (210122220111012), we get a palindrome (420233242332024).

The spelling of 210111022221012 in words is "two hundred ten trillion, one hundred eleven billion, twenty-two million, two hundred twenty-one thousand, twelve".