1211000102070 has 128 divisors (see below), whose sum is σ = 3198032782848. Its totient is φ = 291047116800.

The previous prime is 1211000102017. The next prime is 1211000102071. The reversal of 1211000102070 is 702010001121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211000102071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20122725 + ... + 20182815.

It is an arithmetic number, because the mean of its divisors is an integer number (24984631116).

Almost surely, 2^{1211000102070} is an apocalyptic number.

1211000102070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211000102070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1599016391424).

1211000102070 is an abundant number, since it is smaller than the sum of its proper divisors (1987032680778).

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

1211000102070 is a wasteful number, since it uses less digits than its factorization.

1211000102070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60638.

The product of its (nonzero) digits is 28, while the sum is 15.

Adding to 1211000102070 its reverse (702010001121), we get a palindrome (1913010103191).

The spelling of 1211000102070 in words is "one trillion, two hundred eleven billion, one hundred two thousand, seventy".