1021121010 has 96 divisors (see below), whose sum is σ = 3267613440. Its totient is φ = 215443584.

The previous prime is 1021120987. The next prime is 1021121033. The reversal of 1021121010 is 101211201.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1021120987) and next prime (1021121033).

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 = 1021120983 and 1021121001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 54150 + ... + 70529.

It is an arithmetic number, because the mean of its divisors is an integer number (34037640).

Almost surely, 2^1021121010 is an apocalyptic number.

1021121010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021121010 is an abundant number, since it is smaller than the sum of its proper divisors (2246492430).

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

1021121010 is a wasteful number, since it uses less digits than its factorization.

1021121010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124712 (or 124709 counting only the distinct ones).

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

The square root of 1021121010 is about 31954.9841182874. The cubic root of 1021121010 is about 1006.9913438679.

Adding to 1021121010 its reverse (101211201), we get a palindrome (1122332211).

The spelling of 1021121010 in words is "one billion, twenty-one million, one hundred twenty-one thousand, ten".