1221110201012 has 72 divisors (see below), whose sum is σ = 2477041005600. Its totient is φ = 524876796288.

The previous prime is 1221110200951. The next prime is 1221110201021. The reversal of 1221110201012 is 2101020111221.

It is a super-2 number, since 2×1221110201012² (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 23 ways as a sum of consecutive naturals, for example, 47903 + ... + 1563494.

It is an arithmetic number, because the mean of its divisors is an integer number (34403347300).

Almost surely, 2^{1221110201012} is an apocalyptic number.

It is an amenable number.

1221110201012 is an abundant number, since it is smaller than the sum of its proper divisors (1255930804588).

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

1221110201012 is a wasteful number, since it uses less digits than its factorization.

1221110201012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611505 (or 1611490 counting only the distinct ones).

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

Adding to 1221110201012 its reverse (2101020111221), we get a palindrome (3322130312233).

The spelling of 1221110201012 in words is "one trillion, two hundred twenty-one billion, one hundred ten million, two hundred one thousand, twelve".