1221012001202 has 32 divisors (see below), whose sum is σ = 2109959897088. Its totient is φ = 519092972496.

The previous prime is 1221012001189. The next prime is 1221012001213. The reversal of 1221012001202 is 2021002101221.

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 15 ways as a sum of consecutive naturals, for example, 12766403 + ... + 12861689.

It is an arithmetic number, because the mean of its divisors is an integer number (65936246784).

Almost surely, 2^{1221012001202} is an apocalyptic number.

1221012001202 is a deficient number, since it is larger than the sum of its proper divisors (888947895886).

1221012001202 is a wasteful number, since it uses less digits than its factorization.

1221012001202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102630.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1221012001202 its reverse (2021002101221), we get a palindrome (3242014102423).

The spelling of 1221012001202 in words is "one trillion, two hundred twenty-one billion, twelve million, one thousand, two hundred two".