121211020010 has 16 divisors (see below), whose sum is σ = 219116234376. Its totient is φ = 48276319488.

The previous prime is 121211020003. The next prime is 121211020069. The reversal of 121211020010 is 10020112121.

It can be written as a sum of positive squares in 4 ways, for example, as 102299544649 + 18911475361 = 319843^2 + 137519^2 .

It is a super-2 number, since 2×121211020010² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121211019973 and 121211020000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26008619 + ... + 26013278.

Almost surely, 2^121211020010 is an apocalyptic number.

121211020010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121211020010 is a deficient number, since it is larger than the sum of its proper divisors (97905214366).

121211020010 is a wasteful number, since it uses less digits than its factorization.

121211020010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52022137.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121211020010 its reverse (10020112121), we get a palindrome (131231132131).

The spelling of 121211020010 in words is "one hundred twenty-one billion, two hundred eleven million, twenty thousand, ten".