121211000010 has 24 divisors (see below), whose sum is σ = 315148600260. Its totient is φ = 32322933312.

The previous prime is 121210999999. The next prime is 121211000041. The reversal of 121211000010 is 10000112121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 121210511409 + 488601 = 348153^2 + 699^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 121210999956 and 121211000001.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 673394355 + ... + 673394534.

Almost surely, 2^121211000010 is an apocalyptic number.

121211000010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121211000010 is an abundant number, since it is smaller than the sum of its proper divisors (193937600250).

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

121211000010 is a wasteful number, since it uses less digits than its factorization.

121211000010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346788902 (or 1346788899 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 121211000010 its reverse (10000112121), we get a palindrome (131211112131).

The spelling of 121211000010 in words is "one hundred twenty-one billion, two hundred eleven million, ten", and thus it is an aban number.