1211020020102 has 64 divisors (see below), whose sum is σ = 2534419238400. Its totient is φ = 385266604800.

The previous prime is 1211020020059. The next prime is 1211020020103. The reversal of 1211020020102 is 2010200201121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211020020103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69786727 + ... + 69804077.

It is an arithmetic number, because the mean of its divisors is an integer number (39600300600).

Almost surely, 2^{1211020020102} is an apocalyptic number.

1211020020102 is an abundant number, since it is smaller than the sum of its proper divisors (1323399218298).

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

1211020020102 is a wasteful number, since it uses less digits than its factorization.

1211020020102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21981.

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

Adding to 1211020020102 its reverse (2010200201121), we get a palindrome (3221220221223).

The spelling of 1211020020102 in words is "one trillion, two hundred eleven billion, twenty million, twenty thousand, one hundred two".