1990211101202 has 4 divisors (see below), whose sum is σ = 2985316651806. Its totient is φ = 995105550600.

The previous prime is 1990211101187. The next prime is 1990211101217. The reversal of 1990211101202 is 2021011120991.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1990211101187) and next prime (1990211101217).

It can be written as a sum of positive squares in only one way, i.e., 1577262203881 + 412948897321 = 1255891^2 + 642611^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497552775299 + ... + 497552775302.

Almost surely, 2^{1990211101202} is an apocalyptic number.

1990211101202 is a deficient number, since it is larger than the sum of its proper divisors (995105550604).

1990211101202 is an equidigital number, since it uses as much as digits as its factorization.

1990211101202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995105550603.

The product of its (nonzero) digits is 648, while the sum is 29.

The spelling of 1990211101202 in words is "one trillion, nine hundred ninety billion, two hundred eleven million, one hundred one thousand, two hundred two".