210121402040 has 64 divisors (see below), whose sum is σ = 542897424000. Its totient is φ = 72386317440.

The previous prime is 210121402009. The next prime is 210121402079. The reversal of 210121402040 is 40204121012.

210121402040 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 12558710 + ... + 12575429.

It is an arithmetic number, because the mean of its divisors is an integer number (8482772250).

Almost surely, 2^210121402040 is an apocalyptic number.

210121402040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210121402040 is an abundant number, since it is smaller than the sum of its proper divisors (332776021960).

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

210121402040 is a wasteful number, since it uses less digits than its factorization.

210121402040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25134180 (or 25134176 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 210121402040 its reverse (40204121012), we get a palindrome (250325523052).

The spelling of 210121402040 in words is "two hundred ten billion, one hundred twenty-one million, four hundred two thousand, forty".