1210012020 has 120 divisors (see below), whose sum is σ = 4338157824. Its totient is φ = 276571584.

The previous prime is 1210012007. The next prime is 1210012051. The reversal of 1210012020 is 202100121.

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 = 1210011993 and 1210012011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 42012 + ... + 64691.

Almost surely, 2^1210012020 is an apocalyptic number.

1210012020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210012020 is an abundant number, since it is smaller than the sum of its proper divisors (3128145804).

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

1210012020 is a wasteful number, since it uses less digits than its factorization.

1210012020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106731 (or 106720 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1210012020 is about 34785.2270367753. The cubic root of 1210012020 is about 1065.6057652780.

Adding to 1210012020 its reverse (202100121), we get a palindrome (1412112141).

The spelling of 1210012020 in words is "one billion, two hundred ten million, twelve thousand, twenty".