1221321140102 has 32 divisors (see below), whose sum is σ = 2218758469632. Its totient is φ = 492210036864.

The previous prime is 1221321140087. The next prime is 1221321140147. The reversal of 1221321140102 is 2010411231221.

It is a super-2 number, since 2×1221321140102² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1929398 + ... + 2482985.

It is an arithmetic number, because the mean of its divisors is an integer number (69336202176).

Almost surely, 2^{1221321140102} is an apocalyptic number.

1221321140102 is a deficient number, since it is larger than the sum of its proper divisors (997437329530).

1221321140102 is a wasteful number, since it uses less digits than its factorization.

1221321140102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4413572.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 1221321140102 its reverse (2010411231221), we get a palindrome (3231732371323).

The spelling of 1221321140102 in words is "one trillion, two hundred twenty-one billion, three hundred twenty-one million, one hundred forty thousand, one hundred two".