1221122100102 has 16 divisors (see below), whose sum is σ = 2443283039232. Its totient is φ = 406867560200.

The previous prime is 1221122100089. The next prime is 1221122100139. The reversal of 1221122100102 is 2010012211221.

It is a super-3 number, since 3×1221122100102³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43269678 + ... + 43297889.

It is an arithmetic number, because the mean of its divisors is an integer number (152705189952).

Almost surely, 2^{1221122100102} is an apocalyptic number.

1221122100102 is an abundant number, since it is smaller than the sum of its proper divisors (1222160939130).

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

1221122100102 is a wasteful number, since it uses less digits than its factorization.

1221122100102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86569923.

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

Adding to 1221122100102 its reverse (2010012211221), we get a palindrome (3231134311323).

The spelling of 1221122100102 in words is "one trillion, two hundred twenty-one billion, one hundred twenty-two million, one hundred thousand, one hundred two".