1221211200102 has 64 divisors (see below), whose sum is σ = 2573658489600. Its totient is φ = 385787525760.

The previous prime is 1221211200061. The next prime is 1221211200113. The reversal of 1221211200102 is 2010021121221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1728477 + ... + 2330247.

It is an arithmetic number, because the mean of its divisors is an integer number (40213413900).

Almost surely, 2^{1221211200102} is an apocalyptic number.

1221211200102 is an abundant number, since it is smaller than the sum of its proper divisors (1352447289498).

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

1221211200102 is a wasteful number, since it uses less digits than its factorization.

1221211200102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602021.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1221211200102 its reverse (2010021121221), we get a palindrome (3231232321323).

The spelling of 1221211200102 in words is "one trillion, two hundred twenty-one billion, two hundred eleven million, two hundred thousand, one hundred two".