73720021102 has 32 divisors (see below), whose sum is σ = 136113711552. Its totient is φ = 29160705024.

The previous prime is 73720021073. The next prime is 73720021139. The reversal of 73720021102 is 20112002737.

It is a super-2 number, since 2×73720021102² (a number of 23 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, 2217918 + ... + 2250910.

It is an arithmetic number, because the mean of its divisors is an integer number (4253553486).

Almost surely, 2^73720021102 is an apocalyptic number.

73720021102 is a deficient number, since it is larger than the sum of its proper divisors (62393690450).

73720021102 is a wasteful number, since it uses less digits than its factorization.

73720021102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45292.

The product of its (nonzero) digits is 1176, while the sum is 25.

Adding to 73720021102 its reverse (20112002737), we get a palindrome (93832023839).

The spelling of 73720021102 in words is "seventy-three billion, seven hundred twenty million, twenty-one thousand, one hundred two".