2101213000 has 32 divisors (see below), whose sum is σ = 4916840760. Its totient is φ = 840484800.

The previous prime is 2101212923. The next prime is 2101213019. The reversal of 2101213000 is 3121012.

It can be written as a sum of positive squares in 4 ways, for example, as 685497124 + 1415715876 = 26182^2 + 37626^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

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, 1049607 + ... + 1051606.

Almost surely, 2^2101213000 is an apocalyptic number.

2101213000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101213000 is an abundant number, since it is smaller than the sum of its proper divisors (2815627760).

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

2101213000 is a wasteful number, since it uses less digits than its factorization.

2101213000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101234 (or 2101220 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 2101213000 is about 45838.9899539682. The cubic root of 2101213000 is about 1280.8256798356.

Adding to 2101213000 its reverse (3121012), we get a palindrome (2104334012).

The spelling of 2101213000 in words is "two billion, one hundred one million, two hundred thirteen thousand".