121420212140 has 24 divisors (see below), whose sum is σ = 269981413632. Its totient is φ = 45711138560.

The previous prime is 121420212127. The next prime is 121420212211. The reversal of 121420212140 is 41212024121.

It is a super-2 number, since 2×121420212140² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178558796 + ... + 178559475.

It is an arithmetic number, because the mean of its divisors is an integer number (11249225568).

Almost surely, 2^121420212140 is an apocalyptic number.

121420212140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121420212140 is an abundant number, since it is smaller than the sum of its proper divisors (148561201492).

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

121420212140 is a wasteful number, since it uses less digits than its factorization.

121420212140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357118297 (or 357118295 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 121420212140 its reverse (41212024121), we get a palindrome (162632236261).

The spelling of 121420212140 in words is "one hundred twenty-one billion, four hundred twenty million, two hundred twelve thousand, one hundred forty".