1221101121002 has 128 divisors (see below), whose sum is σ = 2313641594880. Its totient is φ = 471322644480.

The previous prime is 1221101120983. The next prime is 1221101121077. The reversal of 1221101121002 is 2001211011221.

It is a super-3 number, since 3×1221101121002³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 492974588 + ... + 492977064.

It is an arithmetic number, because the mean of its divisors is an integer number (18075324960).

Almost surely, 2^{1221101121002} is an apocalyptic number.

1221101121002 is a deficient number, since it is larger than the sum of its proper divisors (1092540473878).

1221101121002 is a wasteful number, since it uses less digits than its factorization.

1221101121002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3256.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1221101121002 its reverse (2001211011221), we get a palindrome (3222312132223).

The spelling of 1221101121002 in words is "one trillion, two hundred twenty-one billion, one hundred one million, one hundred twenty-one thousand, two".