1203410661621 has 16 divisors (see below), whose sum is σ = 1833894515328. Its totient is φ = 687616027200.

The previous prime is 1203410661619. The next prime is 1203410661623. The reversal of 1203410661621 is 1261660143021.

It is an interprime number because it is at equal distance from previous prime (1203410661619) and next prime (1203410661623).

It is not a de Polignac number, because 1203410661621 - 2¹ = 1203410661619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1203410661623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1652650 + ... + 2266731.

It is an arithmetic number, because the mean of its divisors is an integer number (114618407208).

Almost surely, 2^{1203410661621} is an apocalyptic number.

It is an amenable number.

1203410661621 is a deficient number, since it is larger than the sum of its proper divisors (630483853707).

1203410661621 is a wasteful number, since it uses less digits than its factorization.

1203410661621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3934012.

The product of its (nonzero) digits is 10368, while the sum is 33.

The spelling of 1203410661621 in words is "one trillion, two hundred three billion, four hundred ten million, six hundred sixty-one thousand, six hundred twenty-one".