121201020421390 has 384 divisors, whose sum is σ = 288216588441600. Its totient is φ = 35827754526720.

The previous prime is 121201020421343. The next prime is 121201020421499. The reversal of 121201020421390 is 93124020102121.

It is a super-3 number, since 3×121201020421390³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 5301638560 + ... + 5301661420.

It is an arithmetic number, because the mean of its divisors is an integer number (750564032400).

Almost surely, 2^{121201020421390} is an apocalyptic number.

121201020421390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121201020421390 is an abundant number, since it is smaller than the sum of its proper divisors (167015568020210).

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

121201020421390 is a wasteful number, since it uses less digits than its factorization.

121201020421390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23252 (or 23239 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 121201020421390 in words is "one hundred twenty-one trillion, two hundred one billion, twenty million, four hundred twenty-one thousand, three hundred ninety".