212021211210102 has 256 divisors, whose sum is σ = 564844322488320. Its totient is φ = 57638211548544.

The previous prime is 212021211210047. The next prime is 212021211210113. The reversal of 212021211210102 is 201012112120212.

212021211210102 is a `hidden beast` number, since 2 + 120 + 21 + 211 + 210 + 102 = 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 127 ways as a sum of consecutive naturals, for example, 2487389028 + ... + 2487474264.

It is an arithmetic number, because the mean of its divisors is an integer number (2206423134720).

Almost surely, 2^{212021211210102} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212021211210102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282422161244160).

212021211210102 is an abundant number, since it is smaller than the sum of its proper divisors (352823111278218).

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

212021211210102 is a wasteful number, since it uses less digits than its factorization.

212021211210102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86784 (or 86778 counting only the distinct ones).

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

Adding to 212021211210102 its reverse (201012112120212), we get a palindrome (413033323330314).

The spelling of 212021211210102 in words is "two hundred twelve trillion, twenty-one billion, two hundred eleven million, two hundred ten thousand, one hundred two".