1221362202072 has 64 divisors (see below), whose sum is σ = 3337308518400. Its totient is φ = 370812049920.

The previous prime is 1221362202061. The next prime is 1221362202101. The reversal of 1221362202072 is 2702022631221.

It is a super-2 number, since 2×1221362202072² (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, 48270172 + ... + 48295467.

It is an arithmetic number, because the mean of its divisors is an integer number (52145445600).

Almost surely, 2^{1221362202072} is an apocalyptic number.

1221362202072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1221362202072 is an abundant number, since it is smaller than the sum of its proper divisors (2115946316328).

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

1221362202072 is a wasteful number, since it uses less digits than its factorization.

1221362202072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96565696 (or 96565692 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

Adding to 1221362202072 its reverse (2702022631221), we get a palindrome (3923384833293).

The spelling of 1221362202072 in words is "one trillion, two hundred twenty-one billion, three hundred sixty-two million, two hundred two thousand, seventy-two".